Do you believe in the existence of alien, UFO, or something like that? I really believe in their existence? If so, why only a few people can sense or see them? In my opinion, It is just for our present science level can't reach them. If you don't believe you can read this article to know more. Every thing said in this sounds quite reasonable. Sorry for not posting all here for your convenient reading because this forums does not allow post so much content here. Welcome any comment or sharing your knowledge about this ailen topic.